I went with Air Force as well. They get to fly around in jets, have super secret military bases like Area 51/Groom Lake. Plus, I'm also a fan of the Staragate SG-1 Series on TV and that's Air Force.
It's either the Air Force because I almost joined it when I was younger (flying planes ROCKS and it's one of the best things I've ever done), or the Army which is also good.
i'll say the airforce. A-10s, sparrow missiles jetting out from under F-15s, definitely gets my pulse going. Its becoming less popular in my eyes just because of the bombing and killing of innocent civilians in iraq and afghanistan
I like the national guard and have thought about joining it. I like the Coast Guard also. The navy and marines come practice doing jumps and treading water at the pool I practice at a couple times a year.